1 appendix b-1. list of impaired waters for connecticut

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1 Appendix B-1. List of Impaired Waters for Connecticut (EPA Category 5)

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1 Appendix B-1. List of Impaired Waters for Connecticut (EPA Category 5)

2020 IWQR Appendix B-1 List of Impaired Waters for Connecticut (EPA Category 5)

2

Waterbody Segment ID

Waterbody Name Impaired Designated Use Cause

CT1001-00-1-L1_01

Wyassup Lake (North Stonington) Fish Consumption MERCURY

CT2000-30_01

Fenger Brook (Waterford)-01 Habitat for Fish, Other Aquatic Life and Wildlife CAUSE UNKNOWN

CT2101-01_01

Wheeler Brook (Stonington)-01 Recreation

ESCHERICHIA COLI (E. COLI)

CT2101-03_01

Donahue Brook (Stonington)-01 Recreation

ESCHERICHIA COLI (E. COLI)

CT2202-00_01

Latimer Brook (East Lyme)-01 Recreation ESCHERICHIA COLI (E. COLI)

CT2204-03_01

Stony Brook (Waterford)-01 Recreation ESCHERICHIA COLI (E. COLI)

CT2205-02-1-L1_01

Dodge Pond (East Lyme) Fish Consumption MERCURY

CT3002-02-1-L2_01

Amos Lake (Preston) Recreation ALGAE

CT3002-02-1-L2_01

Amos Lake (Preston) Recreation CHLOROPHYLL-A

CT3002-02-1-L2_01

Amos Lake (Preston) Recreation NUTRIENTS

CT3004-00_01

Oxoboxo Brook-01 Habitat for Fish, Other Aquatic Life and Wildlife CAUSE UNKNOWN

2020 IWQR Appendix B-1 List of Impaired Waters for Connecticut (EPA Category 5)

3

Waterbody Segment ID

Waterbody Name Impaired Designated Use Cause

CT3006-00_01

Hunts Brook (Waterford)-01 Habitat for Fish, Other Aquatic Life and Wildlife CAUSE UNKNOWN

CT3100-00_05

Willimantic River (Tolland/Willington/Ellington/Stafford)-05

Habitat for Fish, Other Aquatic Life and Wildlife CAUSE UNKNOWN

CT3100-00_05

Willimantic River (Tolland/Willington/Ellington/Stafford)-05 Recreation

ESCHERICHIA COLI (E. COLI)

CT3207-12_01

Roberts Brook (Mansfield)-01 Habitat for Fish, Other Aquatic Life and Wildlife CAUSE UNKNOWN

CT3208-00_01

Sawmill Brook (Mansfield)-01 Recreation ESCHERICHIA COLI (E. COLI)

CT3208-02_01

Conantville Brook (Mansfield)-01 Recreation ESCHERICHIA COLI (E. COLI)

CT3300-10_01

Quinatissett Brook (Thompson)-01 Recreation ESCHERICHIA COLI (E. COLI)

CT3700-00_01

Quinebaug River (Lisbon/Griswold)-01

Habitat for Fish, Other Aquatic Life and Wildlife CAUSE UNKNOWN

CT3700-00_04

Quinebaug River (Putnam)-04 Habitat for Fish, Other Aquatic Life and Wildlife CAUSE UNKNOWN

CT3700-00_05

Quinebaug River (Putnam/Thompson)-05

Habitat for Fish, Other Aquatic Life and Wildlife CAUSE UNKNOWN

CT3700-00_05

Quinebaug River (Putnam/Thompson)-05

Recreation ESCHERICHIA COLI (E. COLI)

2020 IWQR Appendix B-1 List of Impaired Waters for Connecticut (EPA Category 5)

4

Waterbody Segment ID

Waterbody Name Impaired Designated Use Cause

CT3700-00-2+L1_01

West Thompson Lake (Thompson) Habitat for Fish, Other Aquatic Life and Wildlife ALGAE

CT3700-00-2+L1_01

West Thompson Lake (Thompson) Habitat for Fish, Other Aquatic Life and Wildlife CHLOROPHYLL-A

CT3700-00-2+L1_01

West Thompson Lake (Thompson) Habitat for Fish, Other Aquatic Life and Wildlife NUTRIENTS

CT3700-00-2+L1_01

West Thompson Lake (Thompson) Recreation ALGAE

CT3700-00-2+L1_01

West Thompson Lake (Thompson) Recreation CHLOROPHYLL-A

CT3700-00-2+L1_01

West Thompson Lake (Thompson) Recreation NUTRIENTS

CT3700-00-5+L4_01

Aspinook Pond (Canterbury/Griswold/Lisbon)

Recreation ALGAE

CT3700-00-5+L4_01

Aspinook Pond (Canterbury/Griswold/Lisbon)

Recreation CHLOROPHYLL-A

CT3700-00-5+L4_01

Aspinook Pond (Canterbury/Griswold/Lisbon)

Recreation NUTRIENTS

CT3700-17_01

Durkee Brook (Pomfret)-01 Recreation ESCHERICHIA COLI (E. COLI)

2020 IWQR Appendix B-1 List of Impaired Waters for Connecticut (EPA Category 5)

5

Waterbody Segment ID

Waterbody Name Impaired Designated Use Cause

CT3708-00_01

Little River (Putnam/Woodstock)-01 Recreation ESCHERICHIA COLI (E. COLI)

CT3708-00-1-L1_01

Roseland Lake (Woodstock) Recreation NUTRIENTS

CT3708-18_01

Wheatons Brook (Putnam/Thompson)-01

Recreation ESCHERICHIA COLI (E. COLI)

CT3709-00_01

Wappaquoia Brook-01 Recreation ESCHERICHIA COLI (E. COLI)

CT3709-02_01

Day Brook (Pomfret)-01 Recreation ESCHERICHIA COLI (E. COLI)

CT3800-00_01

Shetucket River (Norwich)-01 Recreation ESCHERICHIA COLI (E. COLI)

CT3800-00-6+L3_01

Spaulding Pond (Norwich) Recreation ESCHERICHIA COLI (E. COLI)

CT3805-00_02

Little River (Sprague)-02 Fish Consumption MERCURY

CT3805-00_02

Little River (Sprague)-02 Fish Consumption POLYCHLORINATED BIPHENYLS (PCBS)

CT3805-00_02

Little River (Sprague)-02 Habitat for Fish, Other Aquatic Life and Wildlife CAUSE UNKNOWN

CT3805-00_02

Little River (Sprague)-02 Habitat for Fish, Other Aquatic Life and Wildlife WHOLE EFFLUENT TOXICITY (WET)

CT3805-00-3-L6_01

Papermill Pond (Sprague) Fish Consumption MERCURY

2020 IWQR Appendix B-1 List of Impaired Waters for Connecticut (EPA Category 5)

6

Waterbody Segment ID

Waterbody Name Impaired Designated Use Cause

CT3805-00-3-L6_01

Papermill Pond (Sprague) Fish Consumption POLYCHLORINATED BIPHENYLS (PCBS)

CT3805-00-3-L7_01

Versailles Pond (Sprague) Fish Consumption MERCURY

CT3805-00-3-L7_01

Versailles Pond (Sprague) Fish Consumption POLYCHLORINATED BIPHENYLS (PCBS)

CT3805-00-3-L7_01

Versailles Pond (Sprague) Habitat for Fish, Other Aquatic Life and Wildlife NUTRIENTS

CT3900-00_trib_01

Unnamed Trib, Yantic River (Norwich Landfill)-01

Habitat for Fish, Other Aquatic Life and Wildlife AMMONIA, UN-IONIZED

CT3900-00_trib_01

Unnamed Trib, Yantic River (Norwich Landfill)-01

Habitat for Fish, Other Aquatic Life and Wildlife COPPER

CT3900-00_trib_01

Unnamed Trib, Yantic River (Norwich Landfill)-01

Habitat for Fish, Other Aquatic Life and Wildlife DISSOLVED OXYGEN

CT3900-00_trib_01

Unnamed Trib, Yantic River (Norwich Landfill)-01

Habitat for Fish, Other Aquatic Life and Wildlife LEAD

CT3900-00_trib_01

Unnamed Trib, Yantic River (Norwich Landfill)-01

Habitat for Fish, Other Aquatic Life and Wildlife NUTRIENTS

2020 IWQR Appendix B-1 List of Impaired Waters for Connecticut (EPA Category 5)

7

Waterbody Segment ID

Waterbody Name Impaired Designated Use Cause

CT3900-00_trib_01

Unnamed Trib, Yantic River (Norwich Landfill)-01

Habitat for Fish, Other Aquatic Life and Wildlife ORGANIC ENRICHMENT (SEWAGE) BIOLOGICAL INDICATORS

CT3900-00-UL_pond_01

Browning Pond (Norwich Landfill)-01

Habitat for Fish, Other Aquatic Life and Wildlife AMMONIA, UN-IONIZED

CT3900-00-UL_pond_01

Browning Pond (Norwich Landfill)-01

Habitat for Fish, Other Aquatic Life and Wildlife COPPER

CT3900-00-UL_pond_01

Browning Pond (Norwich Landfill)-01

Habitat for Fish, Other Aquatic Life and Wildlife DISSOLVED OXYGEN

CT3900-00-UL_pond_01

Browning Pond (Norwich Landfill)-01

Habitat for Fish, Other Aquatic Life and Wildlife LEAD

CT3900-00-UL_pond_01

Browning Pond (Norwich Landfill)-01

Habitat for Fish, Other Aquatic Life and Wildlife NUTRIENTS

CT3900-00-UL_pond_01

Browning Pond (Norwich Landfill)-01

Habitat for Fish, Other Aquatic Life and Wildlife ORGANIC ENRICHMENT (SEWAGE) BIOLOGICAL INDICATORS

CT3900-07_01

Kahn Brook (Bozrah)-01 Habitat for Fish, Other Aquatic Life and Wildlife CAUSE UNKNOWN

2020 IWQR Appendix B-1 List of Impaired Waters for Connecticut (EPA Category 5)

8

Waterbody Segment ID

Waterbody Name Impaired Designated Use Cause

CT3900-07_01

Kahn Brook (Bozrah)-01 Habitat for Fish, Other Aquatic Life and Wildlife PHOSPHORUS, TOTAL

CT3900-07_01

Kahn Brook (Bozrah)-01 Recreation ESCHERICHIA COLI (E. COLI)

CT3902-00_02

Bartlett Brook (Lebanon)-02 Recreation ESCHERICHIA COLI (E. COLI)

CT3905-00_01a

Pease Brook (Bozrah/Franklin/Lebanon)-01a

Recreation ESCHERICHIA COLI (E. COLI)

CT3907-00_01

Susquetonscut Brook-01 Recreation ESCHERICHIA COLI (E. COLI)

CT4000-00_01

Connecticut River-01 Fish Consumption POLYCHLORINATED BIPHENYLS (PCBS)

CT4000-00_02

Connecticut River-02 Fish Consumption POLYCHLORINATED BIPHENYLS (PCBS)

CT4000-00_02

Connecticut River-02 Recreation ESCHERICHIA COLI (E. COLI)

CT4000-00_03

Connecticut River (Portland/Suffield)-03

Fish Consumption POLYCHLORINATED BIPHENYLS (PCBS)

CT4004-02_01

Farm Brook (South Windsor)-01 Habitat for Fish, Other Aquatic Life and Wildlife CAUSE UNKNOWN

CT4013-00_02

Sumner Brook (Middletown)-02 Habitat for Fish, Other Aquatic Life and Wildlife CAUSE UNKNOWN

CT4013-05-1-L1_01

Crystal Lake (Middletown) Recreation ESCHERICHIA COLI (E. COLI)

2020 IWQR Appendix B-1 List of Impaired Waters for Connecticut (EPA Category 5)

9

Waterbody Segment ID

Waterbody Name Impaired Designated Use Cause

CT4100-00_01

Stony Brook (Suffield)-01 Habitat for Fish, Other Aquatic Life and Wildlife CAUSE UNKNOWN

CT4100-00_03

Stony Brook (Suffield)-03 Habitat for Fish, Other Aquatic Life and Wildlife CAUSE UNKNOWN

CT4101-00_01

Muddy Brook (Suffield)-01 Habitat for Fish, Other Aquatic Life and Wildlife CAUSE UNKNOWN

CT4200-00_01

Scantic River-01 Habitat for Fish, Other Aquatic Life and Wildlife CAUSE UNKNOWN

CT4200-00_01

Scantic River-01 Recreation ESCHERICHIA COLI (E. COLI)

CT4200-00_02

Scantic River-02 Recreation ESCHERICHIA COLI (E. COLI)

CT4200-00_03

Scantic River-03 Recreation ESCHERICHIA COLI (E. COLI)

CT4200-15_01

Thrasher Brook (Somers)-01 Recreation ESCHERICHIA COLI (E. COLI)

CT4200-28_01

Dry Brook (South Windsor/East Windsor)-01

Recreation ESCHERICHIA COLI (E. COLI)

CT4202-00_01

Gillettes Brook (Somers)-01 Recreation ESCHERICHIA COLI (E. COLI)

CT4203-00_01

Gulf Stream (Somers)-01 Recreation ESCHERICHIA COLI (E. COLI)

CT4204-00_01

Abbey Brook (Somers)-01 Recreation ESCHERICHIA COLI (E. COLI)

2020 IWQR Appendix B-1 List of Impaired Waters for Connecticut (EPA Category 5)

10

Waterbody Segment ID

Waterbody Name Impaired Designated Use Cause

CT4206-00_01

Broad Brook (East Windsor)-01 Habitat for Fish, Other Aquatic Life and Wildlife CAUSE UNKNOWN

CT4206-00_02

Broad Brook (East Windsor-Ellington)-02

Habitat for Fish, Other Aquatic Life and Wildlife CAUSE UNKNOWN

CT4300-00_01

Farmington River (Windsor)-01 Recreation ESCHERICHIA COLI (E. COLI)

CT4300-00_02

Farmington River (Bloomfield/Farmington)-02

Recreation ESCHERICHIA COLI (E. COLI)

CT4300-32_01

Minister Brook (Simsbury)-01 Recreation

ESCHERICHIA COLI (E. COLI)

CT4300-54_01

Phelps Brook (Windsor)-01 Recreation ESCHERICHIA COLI (E. COLI)

CT4303-00_03

Still River (Winsted)-03 Habitat for Fish, Other Aquatic Life and Wildlife CAUSE UNKNOWN

CT4308-00-1-L2_01

Compensating Res. (L. McDonough) (Barkhamsted/New Hartford)

Fish Consumption MERCURY

CT4309-00_01

Cherry Brook (Canton)-01 Recreation ESCHERICHIA COLI (E. COLI)

CT4311-00_01

Burlington Brook (Burlington)-01 Recreation ESCHERICHIA COLI (E. COLI)

CT4312-00_01

Roaring Brook (Farmington)-01 Recreation ESCHERICHIA COLI (E. COLI)

2020 IWQR Appendix B-1 List of Impaired Waters for Connecticut (EPA Category 5)

11

Waterbody Segment ID

Waterbody Name Impaired Designated Use Cause

CT4314-00_01

Coppermine Brook (Bristol)-01 Habitat for Fish, Other Aquatic Life and Wildlife CAUSE UNKNOWN

CT4315-00_01

Pequabuck River (Plainville)-01 Habitat for Fish, Other Aquatic Life and Wildlife CAUSE UNKNOWN

CT4315-00_01

Pequabuck River (Plainville)-01 Habitat for Fish, Other Aquatic Life and Wildlife PHOSPHORUS, TOTAL

CT4315-00_02

Pequabuck River-02 Habitat for Fish, Other Aquatic Life and Wildlife CAUSE UNKNOWN

CT4315-00_02

Pequabuck River-02 Habitat for Fish, Other Aquatic Life and Wildlife PHOSPHORUS, TOTAL

CT4315-00_03

Pequabuck River-03 Habitat for Fish, Other Aquatic Life and Wildlife CAUSE UNKNOWN

CT4315-00_03

Pequabuck River-03 Habitat for Fish, Other Aquatic Life and Wildlife ZINC

CT4315-00_05

Pequabuck River-05 Habitat for Fish, Other Aquatic Life and Wildlife CAUSE UNKNOWN

CT4315-00_05

Pequabuck River-05 Habitat for Fish, Other Aquatic Life and Wildlife PHOSPHORUS, TOTAL

2020 IWQR Appendix B-1 List of Impaired Waters for Connecticut (EPA Category 5)

12

Waterbody Segment ID

Waterbody Name Impaired Designated Use Cause

CT4315-00_06

Pequabuck River-06 Habitat for Fish, Other Aquatic Life and Wildlife CAUSE UNKNOWN

CT4318-00_01

Hop Brook (Simsbury)-01 Recreation ESCHERICHIA COLI (E. COLI)

CT4321-00_01

Mill Brook (Windsor/Bloomfield)-01 Habitat for Fish, Other Aquatic Life and Wildlife CAUSE UNKNOWN

CT4400-01_01

South Branch Park River (Hartford)-01

Habitat for Fish, Other Aquatic Life and Wildlife CAUSE UNKNOWN

CT4400-01_02

South Branch Park River (Hartford)-02

Habitat for Fish, Other Aquatic Life and Wildlife CAUSE UNKNOWN

CT4402-00_02

Piper Brook-02 Habitat for Fish, Other Aquatic Life and Wildlife CAUSE UNKNOWN

CT4402-00_02

Piper Brook-02 Habitat for Fish, Other Aquatic Life and Wildlife PHOSPHORUS, TOTAL

CT4403-00_01

Trout Brook-01 Habitat for Fish, Other Aquatic Life and Wildlife CAUSE UNKNOWN

CT4403-00_02

Trout Brook-02 Habitat for Fish, Other Aquatic Life and Wildlife CAUSE UNKNOWN

CT4403-00_03

Trout Brook-03 Habitat for Fish, Other Aquatic Life and Wildlife CAUSE UNKNOWN

2020 IWQR Appendix B-1 List of Impaired Waters for Connecticut (EPA Category 5)

13

Waterbody Segment ID

Waterbody Name Impaired Designated Use Cause

CT4404-00_02

North Branch Park River-02 Habitat for Fish, Other Aquatic Life and Wildlife CAUSE UNKNOWN

CT4500-00_01

Hockanum River-01 Habitat for Fish, Other Aquatic Life and Wildlife CAUSE UNKNOWN

CT4500-00_02

Hockanum River (East Hartford/Manchester)-02

Habitat for Fish, Other Aquatic Life and Wildlife CAUSE UNKNOWN

CT4500-00_03

Hockanum River-03 Habitat for Fish, Other Aquatic Life and Wildlife CAUSE UNKNOWN

CT4500-00_04a

Hockanum River-04a Habitat for Fish, Other Aquatic Life and Wildlife CAUSE UNKNOWN

CT4500-00_04b

Hockanum river-04b Habitat for Fish, Other Aquatic Life and Wildlife CAUSE UNKNOWN

CT4500-00_05

Hockanum River-05 Habitat for Fish, Other Aquatic Life and Wildlife CAUSE UNKNOWN

CT4500-00_05

Hockanum River-05 Habitat for Fish, Other Aquatic Life and Wildlife PHOSPHORUS, TOTAL

CT4500-00_06a

Hockanum River-06a Habitat for Fish, Other Aquatic Life and Wildlife CAUSE UNKNOWN

2020 IWQR Appendix B-1 List of Impaired Waters for Connecticut (EPA Category 5)

14

Waterbody Segment ID

Waterbody Name Impaired Designated Use Cause

CT4500-00_06b

Hockanum River (Vernon/Rockville)-06b

Habitat for Fish, Other Aquatic Life and Wildlife CAUSE UNKNOWN

CT4500-00_08

Hockanum river-08 Habitat for Fish, Other Aquatic Life and Wildlife CAUSE UNKNOWN

CT4500-00-3-L3_01

Union Pond (Manchester) Fish Consumption CHLORDANE

CT4500-00-3-L3_01

Union Pond (Manchester) Habitat for Fish, Other Aquatic Life and Wildlife ALGAE

CT4500-00-3-L3_01

Union Pond (Manchester) Habitat for Fish, Other Aquatic Life and Wildlife NUTRIENTS

CT4500-00-3-L3_01

Union Pond (Manchester) Habitat for Fish, Other Aquatic Life and Wildlife SEDIMENTATION/SILTATION

CT4500-04_01

Ogden Brook (Vernon)-01 Habitat for Fish, Other Aquatic Life and Wildlife CAUSE UNKNOWN

CT4500-12_02

Lydall Brook (Manchester)-02 Habitat for Fish, Other Aquatic Life and Wildlife CAUSE UNKNOWN

CT4503-00_01

Tankerhoosen River-01 Habitat for Fish, Other Aquatic Life and Wildlife CAUSE UNKNOWN

2020 IWQR Appendix B-1 List of Impaired Waters for Connecticut (EPA Category 5)

15

Waterbody Segment ID

Waterbody Name Impaired Designated Use Cause

CT4504-00_01

South Fork Hockanum River (Manchester)-01

Habitat for Fish, Other Aquatic Life and Wildlife CAUSE UNKNOWN

CT4600-00_02

Mattabesset River (Cromwell/East Berlin)-02

Habitat for Fish, Other Aquatic Life and Wildlife CAUSE UNKNOWN

CT4600-00_02

Mattabesset River (Cromwell/East Berlin)-02

Recreation ESCHERICHIA COLI (E. COLI)

CT4600-00_03

Mattabesset River-03 Habitat for Fish, Other Aquatic Life and Wildlife CAUSE UNKNOWN

CT4600-00_03

Mattabesset River-03 Recreation ESCHERICHIA COLI (E. COLI)

CT4600-00_04

Mattabesset River-04 Habitat for Fish, Other Aquatic Life and Wildlife CAUSE UNKNOWN

CT4600-00_04

Mattabesset River-04 Recreation ESCHERICHIA COLI (E. COLI)

CT4600-00_05

Mattabesset River-05 Habitat for Fish, Other Aquatic Life and Wildlife CAUSE UNKNOWN

CT4600-00_06

Mattabesset River-06 Habitat for Fish, Other Aquatic Life and Wildlife CAUSE UNKNOWN

CT4600-00_06

Mattabesset River-06 Recreation ESCHERICHIA COLI (E. COLI)

CT4600-00-trib_01

Unnamed tributary Connecticut River (Cromwell)-01

Habitat for Fish, Other Aquatic Life and Wildlife CAUSE UNKNOWN

2020 IWQR Appendix B-1 List of Impaired Waters for Connecticut (EPA Category 5)

16

Waterbody Segment ID

Waterbody Name Impaired Designated Use Cause

CT4601-00_01

Belcher Brook-01 Habitat for Fish, Other Aquatic Life and Wildlife CAUSE UNKNOWN

CT4601-00-1-L2_01

Silver Lake (Berlin/Meriden) Habitat for Fish, Other Aquatic Life and Wildlife NUTRIENTS

CT4601-00-1-L2_01

Silver Lake (Berlin/Meriden) Habitat for Fish, Other Aquatic Life and Wildlife TURBIDITY

CT4601-02_01

Hatchery Brook-01 Habitat for Fish, Other Aquatic Life and Wildlife CAUSE UNKNOWN

CT4602-00_01

Willow Brook (New Britain)-01 Habitat for Fish, Other Aquatic Life and Wildlife CAUSE UNKNOWN

CT4602-00_01

Willow Brook (New Britain)-01 Recreation ESCHERICHIA COLI (E. COLI)

CT4603-00_01

Webster Brook-01 Habitat for Fish, Other Aquatic Life and Wildlife CAUSE UNKNOWN

CT4603-00_01

Webster Brook-01 Recreation ESCHERICHIA COLI (E. COLI)

CT4607-00_01

Coginchaug River-01 Habitat for Fish, Other Aquatic Life and Wildlife CAUSE UNKNOWN

CT4607-10-1-L1_01

Beseck Lake (Middlefield) Habitat for Fish, Other Aquatic Life and Wildlife ALGAE

2020 IWQR Appendix B-1 List of Impaired Waters for Connecticut (EPA Category 5)

17

Waterbody Segment ID

Waterbody Name Impaired Designated Use Cause

CT4607-10-1-L1_01

Beseck Lake (Middlefield) Habitat for Fish, Other Aquatic Life and Wildlife CHLOROPHYLL-A

CT4607-10-1-L1_01

Beseck Lake (Middlefield) Habitat for Fish, Other Aquatic Life and Wildlife PHOSPHORUS, TOTAL

CT4607-10-1-L1_01

Beseck Lake (Middlefield) Recreation ALGAE

CT4607-10-1-L1_01

Beseck Lake (Middlefield) Recreation CHLOROPHYLL-A

CT4607-10-1-L1_01

Beseck Lake (Middlefield) Recreation PHOSPHORUS, TOTAL

CT4703-01_01a

Cabin Brook (Colchester)-01 Habitat for Fish, Other Aquatic Life and Wildlife CAUSE UNKNOWN

CT4707-12_01

Lyman Brook (Marlborough)-01 Habitat for Fish, Other Aquatic Life and Wildlife CAUSE UNKNOWN

CT4709-04_02

Pocotopaug Creek (East Hampton)-02

Habitat for Fish, Other Aquatic Life and Wildlife CAUSE UNKNOWN

CT4709-04-1-L1_01

Pocotopaug Lake (East Hampton) Recreation ALGAE

CT4709-04-1-L1_01

Pocotopaug Lake (East Hampton) Recreation CHLOROPHYLL-A

2020 IWQR Appendix B-1 List of Impaired Waters for Connecticut (EPA Category 5)

18

Waterbody Segment ID

Waterbody Name Impaired Designated Use Cause

CT4709-04-1-L1_01

Pocotopaug Lake (East Hampton) Recreation NUTRIENTS

CT5000-55_01

Unnamed trib to Oyster River (Milford)-01

Habitat for Fish, Other Aquatic Life and Wildlife CAUSE UNKNOWN

CT5000-55_02

Unnamed trib to Oyster River (Milford)-02

Habitat for Fish, Other Aquatic Life and Wildlife MERCURY

CT5102-02_02

Spring Lot Brook (Westbrook)-02 Habitat for Fish, Other Aquatic Life and Wildlife CAUSE UNKNOWN

CT5105-00_04

Chatfield Hollow Brook (Killingworth)-04

Habitat for Fish, Other Aquatic Life and Wildlife CAUSE UNKNOWN

CT5111-00_02

Branford River-02 Habitat for Fish, Other Aquatic Life and Wildlife CAUSE UNKNOWN

CT5111-09-2-L3_01

Branford Supply Pond, Northwest (Branford)

Habitat for Fish, Other Aquatic Life and Wildlife SEDIMENTATION/SILTATION

CT5111-09-2-L3_01

Branford Supply Pond, Northwest (Branford)

Habitat for Fish, Other Aquatic Life and Wildlife TOTAL SUSPENDED SOLIDS (TSS)

CT5111-09-2-L3_01

Branford Supply Pond, Northwest (Branford)

Habitat for Fish, Other Aquatic Life and Wildlife TURBIDITY

2020 IWQR Appendix B-1 List of Impaired Waters for Connecticut (EPA Category 5)

19

Waterbody Segment ID

Waterbody Name Impaired Designated Use Cause

CT5112-00_01

Farm River (East Haven)-01 Habitat for Fish, Other Aquatic Life and Wildlife CAUSE UNKNOWN

CT5112-00_02

Farm River (North Branford)-02 Habitat for Fish, Other Aquatic Life and Wildlife CAUSE UNKNOWN

CT5112-10_01

Burrs Brook-01 Habitat for Fish, Other Aquatic Life and Wildlife SODIUM

CT5112-10_01

Burrs Brook-01 Habitat for Fish, Other Aquatic Life and Wildlife TURBIDITY

CT5200-00_01

Quinnipiac River (North Haven/Wallingford)-01

Habitat for Fish, Other Aquatic Life and Wildlife CAUSE UNKNOWN

CT5200-00_02

Quinnipiac River (North Haven/Meriden)-02

Habitat for Fish, Other Aquatic Life and Wildlife CAUSE UNKNOWN

CT5200-00_02

Quinnipiac River (North Haven/Meriden)-02

Habitat for Fish, Other Aquatic Life and Wildlife PHOSPHORUS, TOTAL

CT5200-00_03

Quinnipiac River-03 Habitat for Fish, Other Aquatic Life and Wildlife CAUSE UNKNOWN

CT5200-00_04

Quinnipiac River-04 Habitat for Fish, Other Aquatic Life and Wildlife CAUSE UNKNOWN

2020 IWQR Appendix B-1 List of Impaired Waters for Connecticut (EPA Category 5)

20

Waterbody Segment ID

Waterbody Name Impaired Designated Use Cause

CT5200-00_04

Quinnipiac River-04 Habitat for Fish, Other Aquatic Life and Wildlife PHOSPHORUS, TOTAL

CT5200-00_05

Quinnipiac River-05 Habitat for Fish, Other Aquatic Life and Wildlife CAUSE UNKNOWN

CT5200-00_05

Quinnipiac River-05 Habitat for Fish, Other Aquatic Life and Wildlife PHOSPHORUS, TOTAL

CT5200-00_06

Quinnipiac River-06 Habitat for Fish, Other Aquatic Life and Wildlife CAUSE UNKNOWN

CT5200-00_07

Quinnipiac River-07 Habitat for Fish, Other Aquatic Life and Wildlife CAUSE UNKNOWN

CT5200-00-4-L2_01

Hanover Pond (Meriden) Fish Consumption POLYCHLORINATED BIPHENYLS (PCBS)

CT5200-00-4-L2_01

Hanover Pond (Meriden) Habitat for Fish, Other Aquatic Life and Wildlife NUTRIENTS

CT5200-00-4-L2_01

Hanover Pond (Meriden) Habitat for Fish, Other Aquatic Life and Wildlife SEDIMENTATION/SILTATION

CT5200-00-4-L2_01

Hanover Pond (Meriden) Recreation ESCHERICHIA COLI (E. COLI)

2020 IWQR Appendix B-1 List of Impaired Waters for Connecticut (EPA Category 5)

21

Waterbody Segment ID

Waterbody Name Impaired Designated Use Cause

CT5200-02_01

Patton Brook-01 Habitat for Fish, Other Aquatic Life and Wildlife CAUSE UNKNOWN

CT5200-10_01

Meetinghouse Brook (Wallingford)-01

Habitat for Fish, Other Aquatic Life and Wildlife CAUSE UNKNOWN

CT5200-23_01

Hemingway Creek-01 Habitat for Fish, Other Aquatic Life and Wildlife CAUSE UNKNOWN

CT5202-00_01

Tenmile River (Southington/Cheshire)-01

Habitat for Fish, Other Aquatic Life and Wildlife CAUSE UNKNOWN

CT5203-00_01

Misery Brook (Southington)-01 Habitat for Fish, Other Aquatic Life and Wildlife CAUSE UNKNOWN

CT5205-00_01

Sodom Brook-01 Habitat for Fish, Other Aquatic Life and Wildlife CAUSE UNKNOWN

CT5206-00_01

Harbor Brook (Meriden)-01 Habitat for Fish, Other Aquatic Life and Wildlife CAUSE UNKNOWN

CT5206-00_03

Harbor Brook (Meriden)-03 Habitat for Fish, Other Aquatic Life and Wildlife CAUSE UNKNOWN

CT5206-01_01

Spoon Shop Brook (Meriden)-01 Habitat for Fish, Other Aquatic Life and Wildlife CAUSE UNKNOWN

2020 IWQR Appendix B-1 List of Impaired Waters for Connecticut (EPA Category 5)

22

Waterbody Segment ID

Waterbody Name Impaired Designated Use Cause

CT5206-01_01

Spoon Shop Brook (Meriden)-01 Habitat for Fish, Other Aquatic Life and Wildlife ESCHERICHIA COLI (E. COLI)

CT5206-01_01

Spoon Shop Brook (Meriden)-01 Recreation ESCHERICHIA COLI (E. COLI)

CT5206-02_01

Willow Brook (Meriden)-01 Habitat for Fish, Other Aquatic Life and Wildlife CAUSE UNKNOWN

CT5207-00_01

Wharton Brook-01 Habitat for Fish, Other Aquatic Life and Wildlife CAUSE UNKNOWN

CT5207-00_02

Wharton Brook-02 Habitat for Fish, Other Aquatic Life and Wildlife CAUSE UNKNOWN

CT5207-01_01

Unnamed Tributary to Wharton Brook (Wallingford)-01

Habitat for Fish, Other Aquatic Life and Wildlife CAUSE UNKNOWN

CT5208-00_02a

Muddy River (North Haven)-02a Habitat for Fish, Other Aquatic Life and Wildlife CAUSE UNKNOWN

CT5208-00_02a

Muddy River (North Haven)-02a Recreation ESCHERICHIA COLI (E. COLI)

CT5301-00_01

Willow Brook (Hamden)-01 Recreation ESCHERICHIA COLI (E. COLI)

CT5302-00_03

Mill River (Cheshire)-03 Habitat for Fish, Other Aquatic Life and Wildlife CAUSE UNKNOWN

CT5304-00_01

Wintergreen Brook (New Haven)-01 Recreation ESCHERICHIA COLI (E. COLI)

2020 IWQR Appendix B-1 List of Impaired Waters for Connecticut (EPA Category 5)

23

Waterbody Segment ID

Waterbody Name Impaired Designated Use Cause

CT5305-00_01

West River (New Haven/Woodbridge)-01

Habitat for Fish, Other Aquatic Life and Wildlife CAUSE UNKNOWN

CT5306-00_02

Indian River (Orange)-02 Recreation ESCHERICHIA COLI (E. COLI)

CT5306-01_01

Silver Brook (Orange)-01 Habitat for Fish, Other Aquatic Life and Wildlife CAUSE UNKNOWN

CT5306-01_01

Silver Brook (Orange)-01 Recreation ESCHERICHIA COLI (E. COLI)

CT5306-01_02

Silver Brook (Orange)-02 Recreation ESCHERICHIA COLI (E. COLI)

CT6000-00_01

Housatonic River (Orange/Shelton/Derby)-01

Recreation ESCHERICHIA COLI (E. COLI)

CT6000-00_02

Housatonic River (Shelton/Derby)-02

Recreation ESCHERICHIA COLI (E. COLI)

CT6000-00_04

Housatonic River-04 Recreation ESCHERICHIA COLI (E. COLI)

CT6000-00-5+L1_01

Lillinonah, Lake (Newtown/Southbury/Bridgewater/Brookfield)

Recreation ALGAE

CT6000-00-5+L1_01

Lillinonah, Lake (Newtown/Southbury/Bridgewater/Brookfield)

Recreation CHLOROPHYLL-A

CT6000-00-5+L1_01

Lillinonah, Lake (Newtown/Southbury/Bridgewater/Brookfield)

Recreation FLOATING DEBRIS

2020 IWQR Appendix B-1 List of Impaired Waters for Connecticut (EPA Category 5)

24

Waterbody Segment ID

Waterbody Name Impaired Designated Use Cause

CT6000-00-5+L1_01

Lillinonah, Lake (Newtown/Southbury/Bridgewater/Brookfield)

Recreation NUTRIENTS

CT6000-00-5+L1_01

Lillinonah, Lake (Newtown/Southbury/Bridgewater/Brookfield)

Recreation TASTE

CT6000-00-5+L2_01

Zoar, Lake (Monroe/Newtown/Oxford/Southbury)

Recreation ALGAE

CT6000-00-5+L2_01

Zoar, Lake (Monroe/Newtown/Oxford/Southbury)

Recreation CHLOROPHYLL-A

CT6000-00-5+L2_01

Zoar, Lake (Monroe/Newtown/Oxford/Southbury)

Recreation NUTRIENTS

CT6000-00-5+L2_02

Zoar, Lake (Newtown/Southbury) Recreation ALGAE

CT6000-00-5+L2_02

Zoar, Lake (Newtown/Southbury) Recreation CHLOROPHYLL-A

CT6000-00-5+L2_02

Zoar, Lake (Newtown/Southbury) Recreation NUTRIENTS

CT6000-00-5+L4_01

Housatonic Lake (Shelton/Derby/Seymour/Oxford/Monroe)

Recreation ALGAE

2020 IWQR Appendix B-1 List of Impaired Waters for Connecticut (EPA Category 5)

25

Waterbody Segment ID

Waterbody Name Impaired Designated Use Cause

CT6000-00-5+L4_01

Housatonic Lake (Shelton/Derby/Seymour/Oxford/Monroe)

Recreation CHLOROPHYLL-A

CT6000-00-5+L4_01

Housatonic Lake (Shelton/Derby/Seymour/Oxford/Monroe)

Recreation NUTRIENTS

CT6000-77_01

Twomile Brook (Derby/Orange)-01 Habitat for Fish, Other Aquatic Life and Wildlife CAUSE UNKNOWN

CT6000-88-1-L1_01

Brewsters Pond (Stratford) Fish Consumption CHLORDANE

CT6000-88-1-L1_01

Brewsters Pond (Stratford) Habitat for Fish, Other Aquatic Life and Wildlife ALGAE

CT6000-88-1-L1_01

Brewsters Pond (Stratford) Habitat for Fish, Other Aquatic Life and Wildlife DISSOLVED OXYGEN

CT6000-88-1-L1_01

Brewsters Pond (Stratford) Habitat for Fish, Other Aquatic Life and Wildlife NUTRIENTS

CT6004-00_01

Konkapot River-01 Fish Consumption MERCURY

CT6005-00_01

Factory Brook-01 Habitat for Fish, Other Aquatic Life and Wildlife CAUSE UNKNOWN

CT6005-00_01

Factory Brook-01 Habitat for Fish, Other Aquatic Life and Wildlife PHOSPHORUS, TOTAL

2020 IWQR Appendix B-1 List of Impaired Waters for Connecticut (EPA Category 5)

26

Waterbody Segment ID

Waterbody Name Impaired Designated Use Cause

CT6008-00_02b

Mill Brook (Cornwall)-02b Habitat for Fish, Other Aquatic Life and Wildlife CAUSE UNKNOWN

CT6014-00_01

Bog Hollow Brook (Kent)-01 Recreation ESCHERICHIA COLI (E. COLI)

CT6016-00-1-L3_01

Hatch Pond (Kent) Habitat for Fish, Other Aquatic Life and Wildlife ALGAE

CT6016-00-1-L3_01

Hatch Pond (Kent) Habitat for Fish, Other Aquatic Life and Wildlife CHLOROPHYLL-A

CT6016-00-1-L3_01

Hatch Pond (Kent) Habitat for Fish, Other Aquatic Life and Wildlife DISSOLVED OXYGEN

CT6016-00-1-L3_01

Hatch Pond (Kent) Habitat for Fish, Other Aquatic Life and Wildlife NUTRIENTS

CT6016-00-1-L3_01

Hatch Pond (Kent) Habitat for Fish, Other Aquatic Life and Wildlife SEDIMENTATION/SILTATION

CT6016-00-1-L3_01

Hatch Pond (Kent) Recreation ALGAE

CT6016-00-1-L3_01

Hatch Pond (Kent) Recreation CHLOROPHYLL-A

CT6016-00-1-L3_01

Hatch Pond (Kent) Recreation NUTRIENTS

2020 IWQR Appendix B-1 List of Impaired Waters for Connecticut (EPA Category 5)

27

Waterbody Segment ID

Waterbody Name Impaired Designated Use Cause

CT6016-00-1-L3_01

Hatch Pond (Kent) Recreation SEDIMENTATION/SILTATION

CT6019-00-trib_01

Unnamed tributary Deep Brook (Newtown)-01

Habitat for Fish, Other Aquatic Life and Wildlife CAUSE UNKNOWN

CT6025-00_04

Farmill River-04 Recreation ESCHERICHIA COLI (E. COLI)

CT6026-03_01

Cemetery Pond Brook (Stratford/Shelton)-01

Recreation ESCHERICHIA COLI (E. COLI)

CT6100-00_01

Blackberry River (North Canaan)-01 Fish Consumption POLYCHLORINATED BIPHENYLS (PCBS)

CT6100-00_02a

Blackberry River (North Canaan)-02a

Fish Consumption POLYCHLORINATED BIPHENYLS (PCBS)

CT6100-00_02b

Blackberry River (North Canaan)-02b

Fish Consumption POLYCHLORINATED BIPHENYLS (PCBS)

CT6402-00_01

Ball Pond Brook (New Fairfield)-01 Habitat for Fish, Other Aquatic Life and Wildlife CAUSE UNKNOWN

CT6402-00_01

Ball Pond Brook (New Fairfield)-01 Recreation ESCHERICHIA COLI (E. COLI)

CT6402-00-1-L1_01

Ball Pond (New Fairfield) Recreation ALGAE

CT6402-00-1-L1_01

Ball Pond (New Fairfield) Recreation CHLOROPHYLL-A

CT6402-00-1-L1_01

Ball Pond (New Fairfield) Recreation NUTRIENTS

2020 IWQR Appendix B-1 List of Impaired Waters for Connecticut (EPA Category 5)

28

Waterbody Segment ID

Waterbody Name Impaired Designated Use Cause

CT6502-00-1-L2_01

Waramaug, Lake (Kent/Warren/Washington)

Recreation ALGAE

CT6502-00-1-L2_01

Waramaug, Lake (Kent/Warren/Washington)

Recreation CHLOROPHYLL-A

CT6502-00-1-L2_01

Waramaug, Lake (Kent/Warren/Washington)

Recreation NUTRIENTS

CT6600-00_01

Still River (New Milford/Brookfield)-01

Habitat for Fish, Other Aquatic Life and Wildlife CAUSE UNKNOWN

CT6600-00_02

Still River (Brookfield/Danbury)-02 Habitat for Fish, Other Aquatic Life and Wildlife CAUSE UNKNOWN

CT6600-00_02

Still River (Brookfield/Danbury)-02 Habitat for Fish, Other Aquatic Life and Wildlife PHOSPHORUS, TOTAL

CT6600-00_03

Still River (Danbury)-03 Habitat for Fish, Other Aquatic Life and Wildlife CAUSE UNKNOWN

CT6600-00_03

Still River (Danbury)-03 Recreation ESCHERICHIA COLI (E. COLI)

CT6600-00_04

Still River (Danbury)-04 Habitat for Fish, Other Aquatic Life and Wildlife CAUSE UNKNOWN

CT6600-00_05

Still River (Danbury)-05 Habitat for Fish, Other Aquatic Life and Wildlife CAUSE UNKNOWN

2020 IWQR Appendix B-1 List of Impaired Waters for Connecticut (EPA Category 5)

29

Waterbody Segment ID

Waterbody Name Impaired Designated Use Cause

CT6600-00_05

Still River (Danbury)-05 Recreation ESCHERICHIA COLI (E. COLI)

CT6603-00_01

Padanaram Brook-01 Habitat for Fish, Other Aquatic Life and Wildlife CAUSE UNKNOWN

CT6603-00_01

Padanaram Brook-01 Recreation ESCHERICHIA COLI (E. COLI)

CT6604-00_01

Sympaug Brook-01 Habitat for Fish, Other Aquatic Life and Wildlife CAUSE UNKNOWN

CT6604-00_01

Sympaug Brook-01 Recreation ESCHERICHIA COLI (E. COLI)

CT6705-00-3-L3_01

Bantam Lake (Litchfield/Morris) Recreation ALGAE

CT6705-00-3-L3_01

Bantam Lake (Litchfield/Morris) Recreation CHLOROPHYLL-A

CT6705-00-3-L3_01

Bantam Lake (Litchfield/Morris) Recreation NUTRIENTS

CT6806-00_01

Transylvania Brook (Southbury)-01 Recreation ESCHERICHIA COLI (E. COLI)

CT6900-00_01

Naugatuck River (Derby/Seymour)-01

Habitat for Fish, Other Aquatic Life and Wildlife CAUSE UNKNOWN

CT6900-00_02

Naugatuck River (Seymour/Waterbury)-02

Habitat for Fish, Other Aquatic Life and Wildlife CAUSE UNKNOWN

2020 IWQR Appendix B-1 List of Impaired Waters for Connecticut (EPA Category 5)

30

Waterbody Segment ID

Waterbody Name Impaired Designated Use Cause

CT6900-00_02

Naugatuck River (Seymour/Waterbury)-02

Habitat for Fish, Other Aquatic Life and Wildlife PHOSPHORUS, TOTAL

CT6900-00_03

Naugatuck River-03 Habitat for Fish, Other Aquatic Life and Wildlife CAUSE UNKNOWN

CT6900-00_04

Naugatuck River-04 Habitat for Fish, Other Aquatic Life and Wildlife CAUSE UNKNOWN

CT6900-00_06

Naugatuck River-06 Habitat for Fish, Other Aquatic Life and Wildlife CAUSE UNKNOWN

CT6900-00_07

Naugatuck River-07 Habitat for Fish, Other Aquatic Life and Wildlife CAUSE UNKNOWN

CT6900-00_07

Naugatuck River-07 Habitat for Fish, Other Aquatic Life and Wildlife PHOSPHORUS, TOTAL

CT6900-00_08

Naugatuck River-08 Habitat for Fish, Other Aquatic Life and Wildlife CAUSE UNKNOWN

CT6904-00_01

West Branch Naugatuck River-01 Habitat for Fish, Other Aquatic Life and Wildlife CAUSE UNKNOWN

CT6905-00_01

East Branch Naugatuck River-01 Habitat for Fish, Other Aquatic Life and Wildlife CAUSE UNKNOWN

2020 IWQR Appendix B-1 List of Impaired Waters for Connecticut (EPA Category 5)

31

Waterbody Segment ID

Waterbody Name Impaired Designated Use Cause

CT6910-00_01

Branch Brook-01 Habitat for Fish, Other Aquatic Life and Wildlife CAUSE UNKNOWN

CT6911-00_01

Hancock Brook (Waterbury)-01 Habitat for Fish, Other Aquatic Life and Wildlife CAUSE UNKNOWN

CT6911-05_01

Todd Hollow Brook (Plymouth)-01 Habitat for Fish, Other Aquatic Life and Wildlife CAUSE UNKNOWN

CT6912-00_02

Steele Brook-02 Habitat for Fish, Other Aquatic Life and Wildlife CAUSE UNKNOWN

CT6912-00_02

Steele Brook-02 Habitat for Fish, Other Aquatic Life and Wildlife IRON

CT6914-00_01

Mad River (Waterbury)-01 Habitat for Fish, Other Aquatic Life and Wildlife CAUSE UNKNOWN

CT6914-00_02

Mad River (Waterbury)-02 Habitat for Fish, Other Aquatic Life and Wildlife CAUSE UNKNOWN

CT6914-00_03a

Mad River (Waterbury)-03a Habitat for Fish, Other Aquatic Life and Wildlife CAUSE UNKNOWN

CT6916-00_01

Hop Brook (Naugatuck)-01 Habitat for Fish, Other Aquatic Life and Wildlife CAUSE UNKNOWN

2020 IWQR Appendix B-1 List of Impaired Waters for Connecticut (EPA Category 5)

32

Waterbody Segment ID

Waterbody Name Impaired Designated Use Cause

CT6916-00-3-L4_01

Hop Brook Lake (Waterbury/Middlebury)

Recreation ESCHERICHIA COLI (E. COLI)

CT6917-00_01

Long Meadow Pond Brook-01 Habitat for Fish, Other Aquatic Life and Wildlife CAUSE UNKNOWN

CT6919-00_01

Bladens River (Seymour)-01 Habitat for Fish, Other Aquatic Life and Wildlife CAUSE UNKNOWN

CT6919-00_01

Bladens River (Seymour)-01 Recreation ESCHERICHIA COLI (E. COLI)

CT7000-16_01

Muddy Brook (Westport)-01 Habitat for Fish, Other Aquatic Life and Wildlife CAUSE UNKNOWN

CT7000-16_01

Muddy Brook (Westport)-01 Recreation ESCHERICHIA COLI (E. COLI)

CT7000-16-trib_01

Unnamed tributary, Muddy Brook (Westport)-01

Recreation ESCHERICHIA COLI (E. COLI)

CT7000-17_01

Unnamed trib, Muddy Brook (Westport)-01

Recreation ESCHERICHIA COLI (E. COLI)

CT7000-18_01

Unnamed trib, Sherwood Millpond LIS (Westport)-01

Recreation ESCHERICHIA COLI (E. COLI)

CT7000-22_01

Indian River (Westport)-01 Recreation IRON

CT7000-22_02

Indian River (Westport)-02 Recreation IRON

CT7000-29_01

Unnamed trib to Farm Creek LIS (Norwalk)-01

Recreation ESCHERICHIA COLI (E. COLI)

2020 IWQR Appendix B-1 List of Impaired Waters for Connecticut (EPA Category 5)

33

Waterbody Segment ID

Waterbody Name Impaired Designated Use Cause

CT7102-00_01

Bruce Brook (Bridgeport/Stratford)-01

Recreation ESCHERICHIA COLI (E. COLI)

CT7102-00_02

Bruce Brook (Bridgeport/Stratford)-02

Habitat for Fish, Other Aquatic Life and Wildlife CAUSE UNKNOWN

CT7102-00_03

Bruce Brook (Stratford)-03 Recreation ESCHERICHIA COLI (E. COLI)

CT7103-00-2-L3_01

Success Lake (Bridgeport) Habitat for Fish, Other Aquatic Life and Wildlife LEAD

CT7103-00-2-L3_01

Success Lake (Bridgeport) Habitat for Fish, Other Aquatic Life and Wildlife MERCURY

CT7103-00-2-L4_01

Stillman Pond (Bridgeport) Fish Consumption CADMIUM

CT7103-00-2-L4_01

Stillman Pond (Bridgeport) Fish Consumption LEAD

CT7103-00-2-L4_01

Stillman Pond (Bridgeport) Fish Consumption MERCURY

CT7103-00-2-L4_01

Stillman Pond (Bridgeport) Fish Consumption POLYCHLORINATED BIPHENYLS (PCBS)

CT7103-00-2-L5_01

Pembroke Lakes (Bridgeport) Habitat for Fish, Other Aquatic Life and Wildlife LEAD

2020 IWQR Appendix B-1 List of Impaired Waters for Connecticut (EPA Category 5)

34

Waterbody Segment ID

Waterbody Name Impaired Designated Use Cause

CT7103-00-2-L5_01

Pembroke Lakes (Bridgeport) Habitat for Fish, Other Aquatic Life and Wildlife POLYCHLORINATED BIPHENYLS (PCBS)

CT7105-00_01

Pequonnock River (Bridgeport)-01 Recreation

ESCHERICHIA COLI (E. COLI)

CT7105-00_02

Pequonnock River (Bridgeport/Trumbull)-02

Habitat for Fish, Other Aquatic Life and Wildlife CAUSE UNKNOWN

CT7105-00_03

Pequonnock River (Trumbull)-03 Habitat for Fish, Other Aquatic Life and Wildlife CAUSE UNKNOWN

CT7106-02_01

Horse Tavern Brook (Fairfield/Trumbull)-01 Recreation

ESCHERICHIA COLI (E. COLI)

CT7107-00_01

Cricker Brook (Fairfield)-01 Recreation ESCHERICHIA COLI (E. COLI)

CT7108-00_01

Mill River (Fairfield)-01 Recreation

ESCHERICHIA COLI (E. COLI)

CT7108-05_02

Unnamed tributary, Easton Reservoir (Snow Farm)-02

Habitat for Fish, Other Aquatic Life and Wildlife CAUSE UNKNOWN

CT7109-00_01

Sasco Brook (Westport/Fairfield)-01 Habitat for Fish, Other Aquatic Life and Wildlife CAUSE UNKNOWN

CT7200-00_01

Saugatuck River-01 Recreation

ESCHERICHIA COLI (E. COLI)

CT7200-29_01

Deadman Brook (Westport/Fairfield)-01 Recreation

ESCHERICHIA COLI (E. COLI)

CT7201-00_01

Little River (Redding)-01 Recreation ESCHERICHIA COLI (E. COLI)

2020 IWQR Appendix B-1 List of Impaired Waters for Connecticut (EPA Category 5)

35

Waterbody Segment ID

Waterbody Name Impaired Designated Use Cause

CT7203-00_01

West Branch Saugatuck River-01 Recreation

ESCHERICHIA COLI (E. COLI)

CT7300-00_01

Norwalk River (Norwalk/Wilton)-01 Habitat for Fish, Other Aquatic Life and Wildlife CAUSE UNKNOWN

CT7300-00_01

Norwalk River (Norwalk/Wilton)-01 Habitat for Fish, Other Aquatic Life and Wildlife SEDIMENTATION/SILTATION

CT7300-00_05

Norwalk River (Ridgefield)-05 Habitat for Fish, Other Aquatic Life and Wildlife CAUSE UNKNOWN

CT7300-00_05

Norwalk River (Ridgefield)-05 Recreation ESCHERICHIA COLI (E. COLI)

CT7300-02_01

Ridgefield Brook (Ridgefield)-01 Habitat for Fish, Other Aquatic Life and Wildlife PHOSPHORUS, TOTAL

CT7300-02_02

Ridgefield Brook (Ridgefield)-02 Habitat for Fish, Other Aquatic Life and Wildlife CAUSE UNKNOWN

CT7300-02_02

Ridgefield Brook (Ridgefield)-02 Recreation ESCHERICHIA COLI (E. COLI)

CT7300-07_01

Cooper Pond Brook-01 Habitat for Fish, Other Aquatic Life and Wildlife CAUSE UNKNOWN

CT7300-07_02

Cooper Pond Brook-02 Habitat for Fish, Other Aquatic Life and Wildlife CAUSE UNKNOWN

CT7301-00_01

Comstock Brook (Wilton)-01 Recreation ESCHERICHIA COLI (E. COLI)

2020 IWQR Appendix B-1 List of Impaired Waters for Connecticut (EPA Category 5)

36

Waterbody Segment ID

Waterbody Name Impaired Designated Use Cause

CT7301-00_02

Comstock Brook (Wilton)-02 Recreation

ESCHERICHIA COLI (E. COLI)

CT7302-00_01

Silvermine River (Norwalk)-01 Recreation

ESCHERICHIA COLI (E. COLI)

CT7302-13_01

Belden Hill Brook (Wilton)-01 Recreation ESCHERICHIA COLI (E. COLI)

CT7401-00_01

Fivemile River (New Canaan)-01 Habitat for Fish, Other Aquatic Life and Wildlife CAUSE UNKNOWN

CT7401-00_01

Fivemile River (New Canaan)-01 Habitat for Fish, Other Aquatic Life and Wildlife PHOSPHORUS, TOTAL

CT7401-00_02

Fivemile River (New Canaan)-02 Habitat for Fish, Other Aquatic Life and Wildlife CAUSE UNKNOWN

CT7401-00_03

Fivemile River (New Canaan)-03 Habitat for Fish, Other Aquatic Life and Wildlife CAUSE UNKNOWN

CT7401-00_03

Fivemile River (New Canaan)-03 Recreation ESCHERICHIA COLI (E. COLI)

CT7401-00_04

Fivemile River (New Canaan)-04 Habitat for Fish, Other Aquatic Life and Wildlife CAUSE UNKNOWN

CT7402-01_01

Goodwives River (Darien)-01 Recreation

ESCHERICHIA COLI (E. COLI)

CT7403-00_01

Noroton River-01 Habitat for Fish, Other Aquatic Life and Wildlife CAUSE UNKNOWN

2020 IWQR Appendix B-1 List of Impaired Waters for Connecticut (EPA Category 5)

37

Waterbody Segment ID

Waterbody Name Impaired Designated Use Cause

CT7403-00_01

Noroton River-01 Recreation ESCHERICHIA COLI (E. COLI)

CT7403-00_02

Noroton River-02 Habitat for Fish, Other Aquatic Life and Wildlife CAUSE UNKNOWN

CT7403-00_02

Noroton River-02 Recreation ESCHERICHIA COLI (E. COLI)

CT7403-00_03

Noroton River-03 Recreation ESCHERICHIA COLI (E. COLI)

CT7405-00_01

Rippowam River-01 Habitat for Fish, Other Aquatic Life and Wildlife CAUSE UNKNOWN

CT7405-00_01

Rippowam River-01 Recreation ESCHERICHIA COLI (E. COLI)

CT7405-00_02

Rippowam River-02 Habitat for Fish, Other Aquatic Life and Wildlife CAUSE UNKNOWN

CT7407-00_02

Mianus River-02 Habitat for Fish, Other Aquatic Life and Wildlife CAUSE UNKNOWN

CT7408-00_01

Greenwich Creek (Greenwich)-01 Recreation

ESCHERICHIA COLI (E. COLI)

CT7409-00_01

Horseneck Brook-01 Habitat for Fish, Other Aquatic Life and Wildlife CAUSE UNKNOWN

CT7409-00_01

Horseneck Brook-01 Recreation

ESCHERICHIA COLI (E. COLI)

CT7409-00_02

Horseneck Brook-01 Recreation

ESCHERICHIA COLI (E. COLI)

2020 IWQR Appendix B-1 List of Impaired Waters for Connecticut (EPA Category 5)

38

Waterbody Segment ID

Waterbody Name Impaired Designated Use Cause

CT7411-00_01

Byram River-01 Habitat for Fish, Other Aquatic Life and Wildlife CAUSE UNKNOWN

CT8104-00-2-L5_01

Mamanasco Lake (Ridgefield) Habitat for Fish, Other Aquatic Life and Wildlife ALGAE

CT8104-00-2-L5_01

Mamanasco Lake (Ridgefield) Recreation ALGAE

CT-C1_002-SB

LIS CB Inner - Inner Clinton Harbor, Clinton

Habitat for Marine Fish, Other Aquatic Life and Wildlife

DISSOLVED OXYGEN

CT-C1_002-SB

LIS CB Inner - Inner Clinton Harbor, Clinton

Habitat for Marine Fish, Other Aquatic Life and Wildlife

NUTRIENTS

CT-C1_011 LIS CB Inner - Farm River, East Haven

Habitat for Marine Fish, Other Aquatic Life and Wildlife

DISSOLVED OXYGEN, TOTAL NITROGEN, NUTRIENTS

CT-C1_012 LIS CB Inner - Morris Creek, East Haven

Habitat for Marine Fish, Other Aquatic Life and Wildlife

DISSOLVED OXYGEN

CT-C1_012 LIS CB Inner - Morris Creek, East Haven

Habitat for Marine Fish, Other Aquatic Life and Wildlife

NUTRIENTS

CT-C1_012 LIS CB Inner - Morris Creek, East Haven

Habitat for Marine Fish, Other Aquatic Life and Wildlife

OIL AND GREASE

2020 IWQR Appendix B-1 List of Impaired Waters for Connecticut (EPA Category 5)

39

Waterbody Segment ID

Waterbody Name Impaired Designated Use Cause

CT-C1_012 LIS CB Inner - Morris Creek, East Haven

Habitat for Marine Fish, Other Aquatic Life and Wildlife

POLYCHLORINATED BIPHENYLS (PCBS)

CT-C1_013-SB

LIS CB Inner - New Haven Harbor, New Haven

Habitat for Marine Fish, Other Aquatic Life and Wildlife

DISSOLVED OXYGEN

CT-C1_013-SB

LIS CB Inner - New Haven Harbor, New Haven

Habitat for Marine Fish, Other Aquatic Life and Wildlife

NUTRIENTS

CT-C1_013-SB

LIS CB Inner - New Haven Harbor, New Haven

Habitat for Marine Fish, Other Aquatic Life and Wildlife

OIL AND GREASE

CT-C1_013-SB

LIS CB Inner - New Haven Harbor, New Haven

Habitat for Marine Fish, Other Aquatic Life and Wildlife

POLYCHLORINATED BIPHENYLS (PCBS)

CT-C1_014-SB

LIS CB Inner - Quinnipiac River (mouth), New Haven

Habitat for Marine Fish, Other Aquatic Life and Wildlife

DISSOLVED OXYGEN

CT-C1_014-SB

LIS CB Inner - Quinnipiac River (mouth), New Haven

Habitat for Marine Fish, Other Aquatic Life and Wildlife

NUTRIENTS

CT-C1_014-SB

LIS CB Inner - Quinnipiac River (mouth), New Haven

Habitat for Marine Fish, Other Aquatic Life and Wildlife

OIL AND GREASE

CT-C1_014-SB

LIS CB Inner - Quinnipiac River (mouth), New Haven

Habitat for Marine Fish, Other Aquatic Life and Wildlife

POLYCHLORINATED BIPHENYLS (PCBS)

CT-C1_014-SB

LIS CB Inner - Quinnipiac River (mouth), New Haven

Recreation ENTEROCOCCUS

2020 IWQR Appendix B-1 List of Impaired Waters for Connecticut (EPA Category 5)

40

Waterbody Segment ID

Waterbody Name Impaired Designated Use Cause

CT-C1_015-SB

LIS CB Inner - West River (Lower), West Haven

Habitat for Marine Fish, Other Aquatic Life and Wildlife

DISSOLVED OXYGEN

CT-C1_015-SB

LIS CB Inner - West River (Lower), West Haven

Habitat for Marine Fish, Other Aquatic Life and Wildlife

NUTRIENTS

CT-C1_015-SB

LIS CB Inner - West River (Lower), West Haven

Habitat for Marine Fish, Other Aquatic Life and Wildlife

OIL AND GREASE

CT-C1_015-SB

LIS CB Inner - West River (Lower), West Haven

Habitat for Marine Fish, Other Aquatic Life and Wildlife

POLYCHLORINATED BIPHENYLS (PCBS)

CT-C1_015-SB

LIS CB Inner - West River (Lower), West Haven

Recreation ENTEROCOCCUS

CT-C1_016 LIS CB Inner - Cove River, West Haven

Habitat for Marine Fish, Other Aquatic Life and Wildlife

DISSOLVED OXYGEN

CT-C1_016 LIS CB Inner - Cove River, West Haven

Habitat for Marine Fish, Other Aquatic Life and Wildlife

NUTRIENTS

CT-C1_016 LIS CB Inner - Cove River, West Haven

Habitat for Marine Fish, Other Aquatic Life and Wildlife

POLYCHLORINATED BIPHENYLS (PCBS)

CT-C1_017 LIS CB Inner - Oyster River, Milford Habitat for Marine Fish, Other Aquatic Life and Wildlife

DISSOLVED OXYGEN

CT-C1_017 LIS CB Inner - Oyster River, Milford Habitat for Marine Fish, Other Aquatic Life and Wildlife

NUTRIENTS

2020 IWQR Appendix B-1 List of Impaired Waters for Connecticut (EPA Category 5)

41

Waterbody Segment ID

Waterbody Name Impaired Designated Use Cause

CT-C1_017 LIS CB Inner - Oyster River, Milford Habitat for Marine Fish, Other Aquatic Life and Wildlife

POLYCHLORINATED BIPHENYLS (PCBS)

CT-C1_019-SB

LIS CB Inner - Housatonic River (mouth), Milford

Habitat for Marine Fish, Other Aquatic Life and Wildlife

COPPER

CT-C1_019-SB

LIS CB Inner - Housatonic River (mouth), Milford

Habitat for Marine Fish, Other Aquatic Life and Wildlife

DIOXIN (INCLUDING 2,3,7,8-TCDD)

CT-C1_019-SB

LIS CB Inner - Housatonic River (mouth), Milford

Habitat for Marine Fish, Other Aquatic Life and Wildlife

POLYCHLORINATED BIPHENYLS (PCBS)

CT-C1_019-SB

LIS CB Inner - Housatonic River (mouth), Milford

Habitat for Marine Fish, Other Aquatic Life and Wildlife

ZINC

CT-C1_021-SB

LIS CB Inner - Housatonic River (Upper), Orange

Habitat for Marine Fish, Other Aquatic Life and Wildlife

DISSOLVED OXYGEN

CT-C1_021-SB

LIS CB Inner - Housatonic River (Upper), Orange

Habitat for Marine Fish, Other Aquatic Life and Wildlife

NUTRIENTS

CT-C1_022 LIS CB Inner - West River (Upper), West Haven

Habitat for Marine Fish, Other Aquatic Life and Wildlife

DISSOLVED OXYGEN

CT-C1_022 LIS CB Inner - West River (Upper), West Haven

Habitat for Marine Fish, Other Aquatic Life and Wildlife

NUTRIENTS

2020 IWQR Appendix B-1 List of Impaired Waters for Connecticut (EPA Category 5)

42

Waterbody Segment ID

Waterbody Name Impaired Designated Use Cause

CT-C1_022 LIS CB Inner - West River (Upper), West Haven

Habitat for Marine Fish, Other Aquatic Life and Wildlife

OIL AND GREASE

CT-C1_022 LIS CB Inner - West River (Upper), West Haven

Habitat for Marine Fish, Other Aquatic Life and Wildlife

POLYCHLORINATED BIPHENYLS (PCBS)

CT-C1_022 LIS CB Inner - West River (Upper), West Haven

Recreation ENTEROCOCCUS

CT-C1_022 LIS CB Inner - West River (Upper), West Haven

Shellfish Harvesting for Direct Consumption Where Authorized

FECAL COLIFORM

CT-C1_023-SB

LIS CB Inner - Mill River (mouth), New Haven/Hamden

Commercial Shellfish Harvesting Where Authorized

FECAL COLIFORM

CT-C1_023-SB

LIS CB Inner - Mill River (mouth), New Haven/Hamden

Habitat for Marine Fish, Other Aquatic Life and Wildlife

DISSOLVED OXYGEN

CT-C1_023-SB

LIS CB Inner - Mill River (mouth), New Haven/Hamden

Recreation ENTEROCOCCUS

CT-C2_001 LIS CB Shore - Westbrook Harbor (East), Westbrook

Shellfish Harvesting for Direct Consumption Where Authorized

FECAL COLIFORM

CT-C2_015-SB

LIS CB Shore - Pages Cove, Branford Habitat for Marine Fish, Other Aquatic Life and Wildlife

DISSOLVED OXYGEN, TOTAL NITROGEN, NUTRIENTS

CT-C2_017-SB

LIS CB Shore - Morris Cove, New Haven

Habitat for Marine Fish, Other Aquatic Life and Wildlife

DISSOLVED OXYGEN

2020 IWQR Appendix B-1 List of Impaired Waters for Connecticut (EPA Category 5)

43

Waterbody Segment ID

Waterbody Name Impaired Designated Use Cause

CT-C2_017-SB

LIS CB Shore - Morris Cove, New Haven

Habitat for Marine Fish, Other Aquatic Life and Wildlife

NUTRIENTS

CT-C2_017-SB

LIS CB Shore - Morris Cove, New Haven

Habitat for Marine Fish, Other Aquatic Life and Wildlife

OIL AND GREASE

CT-C2_017-SB

LIS CB Shore - Morris Cove, New Haven

Habitat for Marine Fish, Other Aquatic Life and Wildlife

POLYCHLORINATED BIPHENYLS (PCBS)

CT-C2_018-SB

LIS CB Shore - New Haven Harbor (West), West Haven

Commercial Shellfish Harvesting Where Authorized

FECAL COLIFORM

CT-C2_018-SB

LIS CB Shore - New Haven Harbor (West), West Haven

Habitat for Marine Fish, Other Aquatic Life and Wildlife

NUTRIENTS

CT-C2_018-SB

LIS CB Shore - New Haven Harbor (West), West Haven

Habitat for Marine Fish, Other Aquatic Life and Wildlife

OIL AND GREASE

CT-C2_018-SB

LIS CB Shore - New Haven Harbor (West), West Haven

Habitat for Marine Fish, Other Aquatic Life and Wildlife

POLYCHLORINATED BIPHENYLS (PCBS)

CT-C2_018-SB

LIS CB Shore - New Haven Harbor (West), West Haven

Recreation ENTEROCOCCUS

CT-C2_021 LIS CB Shore - Bayview, Milford Shellfish Harvesting for Direct Consumption Where Authorized

FECAL COLIFORM

CT-C2_024-SB

LIS CB Shore - Housatonic River mouth, Stratford

Commercial Shellfish Harvesting Where Authorized

FECAL COLIFORM

2020 IWQR Appendix B-1 List of Impaired Waters for Connecticut (EPA Category 5)

44

Waterbody Segment ID

Waterbody Name Impaired Designated Use Cause

CT-C2_024-SB

LIS CB Shore - Housatonic River mouth, Stratford

Habitat for Marine Fish, Other Aquatic Life and Wildlife

COPPER

CT-C2_024-SB

LIS CB Shore - Housatonic River mouth, Stratford

Habitat for Marine Fish, Other Aquatic Life and Wildlife

DIOXIN (INCLUDING 2,3,7,8-TCDD)

CT-C2_024-SB

LIS CB Shore - Housatonic River mouth, Stratford

Habitat for Marine Fish, Other Aquatic Life and Wildlife

LEAD

CT-C2_024-SB

LIS CB Shore - Housatonic River mouth, Stratford

Habitat for Marine Fish, Other Aquatic Life and Wildlife

POLYCHLORINATED BIPHENYLS (PCBS)

CT-C2_024-SB

LIS CB Shore - Housatonic River mouth, Stratford

Habitat for Marine Fish, Other Aquatic Life and Wildlife

ZINC

CT-C3_005 LIS CB Midshore - Madison Shellfish Harvesting for Direct Consumption Where Authorized

FECAL COLIFORM

CT-C3_015-SB

LIS CB Midshore - New Haven Harbor, New Haven

Habitat for Marine Fish, Other Aquatic Life and Wildlife

DISSOLVED OXYGEN

CT-C3_015-SB

LIS CB Midshore - New Haven Harbor, New Haven

Habitat for Marine Fish, Other Aquatic Life and Wildlife

NUTRIENTS

CT-C3_015-SB

LIS CB Midshore - New Haven Harbor, New Haven

Habitat for Marine Fish, Other Aquatic Life and Wildlife

OIL AND GREASE

2020 IWQR Appendix B-1 List of Impaired Waters for Connecticut (EPA Category 5)

45

Waterbody Segment ID

Waterbody Name Impaired Designated Use Cause

CT-C3_015-SB

LIS CB Midshore - New Haven Harbor, New Haven

Habitat for Marine Fish, Other Aquatic Life and Wildlife

POLYCHLORINATED BIPHENYLS (PCBS)

CT-C3_016 LIS CB Midshore - West Haven Habitat for Marine Fish, Other Aquatic Life and Wildlife

DISSOLVED OXYGEN

CT-C3_016 LIS CB Midshore - West Haven Habitat for Marine Fish, Other Aquatic Life and Wildlife

NITROGEN, TOTAL

CT-C3_016 LIS CB Midshore - West Haven Habitat for Marine Fish, Other Aquatic Life and Wildlife

NUTRIENTS

CT-C3_016 LIS CB Midshore - West Haven Shellfish Harvesting for Direct Consumption Where Authorized

FECAL COLIFORM

CT-E1_001-SB

LIS EB Inner - Pawcatuck River (01), Stonington

Habitat for Marine Fish, Other Aquatic Life and Wildlife

DISSOLVED OXYGEN

CT-E1_001-SB

LIS EB Inner - Pawcatuck River (01), Stonington

Habitat for Marine Fish, Other Aquatic Life and Wildlife

NUTRIENTS

CT-E1_001-SB

LIS EB Inner - Pawcatuck River (01), Stonington

Recreation ENTEROCOCCUS

CT-E1_002-SB

LIS EB Inner - Pawcatuck River (02), Stonington

Habitat for Marine Fish, Other Aquatic Life and Wildlife

ALGAE

CT-E1_002-SB

LIS EB Inner - Pawcatuck River (02), Stonington

Habitat for Marine Fish, Other Aquatic Life and Wildlife

NUTRIENTS

2020 IWQR Appendix B-1 List of Impaired Waters for Connecticut (EPA Category 5)

46

Waterbody Segment ID

Waterbody Name Impaired Designated Use Cause

CT-E1_002-SB

LIS EB Inner - Pawcatuck River (02), Stonington

Recreation ALGAE

CT-E1_002-SB

LIS EB Inner - Pawcatuck River (02), Stonington

Recreation ESTUARINE BIOASSESSMENTS

CT-E1_003 LIS EB Inner - Inner Wequetequock Cove, Stonington

Habitat for Marine Fish, Other Aquatic Life and Wildlife

ALGAE

CT-E1_003 LIS EB Inner - Inner Wequetequock Cove, Stonington

Habitat for Marine Fish, Other Aquatic Life and Wildlife

ESTUARINE BIOASSESSMENTS

CT-E1_003 LIS EB Inner - Inner Wequetequock Cove, Stonington

Recreation ALGAE

CT-E1_003 LIS EB Inner - Inner Wequetequock Cove, Stonington

Recreation ESTUARINE BIOASSESSMENTS

CT-E1_007-SB

LIS EB Inner - Mystic River (Mouth), Stonington

Commercial Shellfish Harvesting Where Authorized

FECAL COLIFORM

CT-E1_014-SB

LIS EB Inner - Thames River (Mouth), New London

Habitat for Marine Fish, Other Aquatic Life and Wildlife

DISSOLVED OXYGEN

CT-E1_014-SB

LIS EB Inner - Thames River (Mouth), New London

Habitat for Marine Fish, Other Aquatic Life and Wildlife

ESTUARINE BIOASSESSMENTS

CT-E1_015-SB

LIS EB Inner - Thames River (middle), Ledyard

Commercial Shellfish Harvesting Where Authorized

FECAL COLIFORM

2020 IWQR Appendix B-1 List of Impaired Waters for Connecticut (EPA Category 5)

47

Waterbody Segment ID

Waterbody Name Impaired Designated Use Cause

CT-E1_015-SB

LIS EB Inner - Thames River (middle), Ledyard

Habitat for Marine Fish, Other Aquatic Life and Wildlife

DISSOLVED OXYGEN

CT-E1_015-SB

LIS EB Inner - Thames River (middle), Ledyard

Habitat for Marine Fish, Other Aquatic Life and Wildlife

ESTUARINE BIOASSESSMENTS

CT-E1_015-SB

LIS EB Inner - Thames River (middle), Ledyard

Recreation ENTEROCOCCUS

CT-E1_016-SB

LIS EB Inner - Thames River (Upper), Norwich

Commercial Shellfish Harvesting Where Authorized

FECAL COLIFORM

CT-E1_016-SB

LIS EB Inner - Thames River (Upper), Norwich

Habitat for Marine Fish, Other Aquatic Life and Wildlife

DISSOLVED OXYGEN

CT-E1_016-SB

LIS EB Inner - Thames River (Upper), Norwich

Habitat for Marine Fish, Other Aquatic Life and Wildlife

ESTUARINE BIOASSESSMENTS

CT-E1_016-SB

LIS EB Inner - Thames River (Upper), Norwich

Habitat for Marine Fish, Other Aquatic Life and Wildlife

NUTRIENTS

CT-E1_016-SB

LIS EB Inner - Thames River (Upper), Norwich

Recreation ENTEROCOCCUS

CT-E1_020 LIS EB Inner - Niantic River (mouth), Niantic

Habitat for Marine Fish, Other Aquatic Life and Wildlife

CAUSE UNKNOWN

CT-E1_020 LIS EB Inner - Niantic River (mouth), Niantic

Habitat for Marine Fish, Other Aquatic Life and Wildlife

ESTUARINE BIOASSESSMENTS

2020 IWQR Appendix B-1 List of Impaired Waters for Connecticut (EPA Category 5)

48

Waterbody Segment ID

Waterbody Name Impaired Designated Use Cause

CT-E1_020 LIS EB Inner - Niantic River (mouth), Niantic

Habitat for Marine Fish, Other Aquatic Life and Wildlife

NUTRIENTS

CT-E1_022 LIS EB Inner - Bride Brook, East Lyme

Shellfish Harvesting for Direct Consumption Where Authorized

FECAL COLIFORM

CT-E1_024-SB

LIS EB Inner - Connecticut River (mouth), Old Lyme

Fish Consumption POLYCHLORINATED BIPHENYLS (PCBS)

CT-E1_027-SB

LIS EB Inner - Duck River, Old Lyme Recreation ENTEROCOCCUS

CT-E1_028-SB

LIS EB Inner - Lieutenant River, Old Lyme

Recreation ENTEROCOCCUS

CT-E1_029-SB

LIS EB Inner - Connecticut River (Lower), Essex

Fish Consumption POLYCHLORINATED BIPHENYLS (PCBS)

CT-E1_031-SB

LIS EB Inner - Connecticut River (upper), Chester

Fish Consumption POLYCHLORINATED BIPHENYLS (PCBS)

CT-E1_033 LIS EB Inner - Pequotsepos Cove, Stonington

Habitat for Marine Fish, Other Aquatic Life and Wildlife

DISSOLVED OXYGEN

CT-E1_033 LIS EB Inner - Pequotsepos Cove, Stonington

Shellfish Harvesting for Direct Consumption Where Authorized

FECAL COLIFORM

CT-E2_001 LIS EB Shore - Wequetequock Cove, Stonington

Habitat for Marine Fish, Other Aquatic Life and Wildlife

ALGAE

CT-E2_001 LIS EB Shore - Wequetequock Cove, Stonington

Habitat for Marine Fish, Other Aquatic Life and Wildlife

ESTUARINE BIOASSESSMENTS

2020 IWQR Appendix B-1 List of Impaired Waters for Connecticut (EPA Category 5)

49

Waterbody Segment ID

Waterbody Name Impaired Designated Use Cause

CT-E2_001 LIS EB Shore - Wequetequock Cove, Stonington

Recreation ALGAE

CT-E2_001 LIS EB Shore - Wequetequock Cove, Stonington

Recreation ESTUARINE BIOASSESSMENTS

CT-E2_002 LIS EB Shore - Stonington Point, Stonington

Habitat for Marine Fish, Other Aquatic Life and Wildlife

ALGAE

CT-E2_002 LIS EB Shore - Stonington Point, Stonington

Habitat for Marine Fish, Other Aquatic Life and Wildlife

ESTUARINE BIOASSESSMENTS

CT-E2_002 LIS EB Shore - Stonington Point, Stonington

Recreation ALGAE

CT-E2_002 LIS EB Shore - Stonington Point, Stonington

Recreation ESTUARINE BIOASSESSMENTS

CT-E2_009-SB

LIS EB Shore - Thames River Mouth (East), Groton

Habitat for Marine Fish, Other Aquatic Life and Wildlife

DISSOLVED OXYGEN

CT-E2_009-SB

LIS EB Shore - Thames River Mouth (East), Groton

Habitat for Marine Fish, Other Aquatic Life and Wildlife

ESTUARINE BIOASSESSMENTS

CT-E2_009-SB

LIS EB Shore - Thames River Mouth (East), Groton

Shellfish Harvesting for Direct Consumption Where Authorized

FECAL COLIFORM

CT-E2_010-SB

LIS EB Shore - Thames Rvr Mouth (West), New London

Commercial Shellfish Harvesting Where Authorized

FECAL COLIFORM

2020 IWQR Appendix B-1 List of Impaired Waters for Connecticut (EPA Category 5)

50

Waterbody Segment ID

Waterbody Name Impaired Designated Use Cause

CT-E2_010-SB

LIS EB Shore - Thames Rvr Mouth (West), New London

Habitat for Marine Fish, Other Aquatic Life and Wildlife

DISSOLVED OXYGEN

CT-E2_010-SB

LIS EB Shore - Thames Rvr Mouth (West), New London

Habitat for Marine Fish, Other Aquatic Life and Wildlife

ESTUARINE BIOASSESSMENTS

CT-E2_011-SB

LIS EB Shore - Thames Rvr Mouth (West), Waterford

Habitat for Marine Fish, Other Aquatic Life and Wildlife

DISSOLVED OXYGEN

CT-E2_011-SB

LIS EB Shore - Thames Rvr Mouth (West), Waterford

Habitat for Marine Fish, Other Aquatic Life and Wildlife

ESTUARINE BIOASSESSMENTS

CT-E2_013 LIS EB Shore - Niantic Bay (East), Waterford

Habitat for Marine Fish, Other Aquatic Life and Wildlife

CAUSE UNKNOWN

CT-E2_014 LIS EB Shore - Niantic Bay (West), East Lyme

Habitat for Marine Fish, Other Aquatic Life and Wildlife

CAUSE UNKNOWN

CT-E2_015 LIS EB Shore - Niantic Bay (Black Pt), East Lyme

Habitat for Marine Fish, Other Aquatic Life and Wildlife

CAUSE UNKNOWN

CT-E3_001 LIS EB Midshore - Stonington Habitat for Marine Fish, Other Aquatic Life and Wildlife

ALGAE

CT-E3_001 LIS EB Midshore - Stonington Habitat for Marine Fish, Other Aquatic Life and Wildlife

ESTUARINE BIOASSESSMENTS

CT-E3_001 LIS EB Midshore - Stonington Recreation ALGAE

2020 IWQR Appendix B-1 List of Impaired Waters for Connecticut (EPA Category 5)

51

Waterbody Segment ID

Waterbody Name Impaired Designated Use Cause

CT-E3_001 LIS EB Midshore - Stonington Recreation ESTUARINE BIOASSESSMENTS

CT-E3_005-SB

LIS EB Midshore - Waterford, Thames River

Habitat for Marine Fish, Other Aquatic Life and Wildlife

DISSOLVED OXYGEN

CT-E3_005-SB

LIS EB Midshore - Waterford, Thames River

Habitat for Marine Fish, Other Aquatic Life and Wildlife

ESTUARINE BIOASSESSMENTS

CT-E3_006 LIS EB Midshore - Niantic Bay Habitat for Marine Fish, Other Aquatic Life and Wildlife

CAUSE UNKNOWN

CT-W1_001-SB

LIS WB Inner - Bridgeport Harbor, Bridgeport

Habitat for Marine Fish, Other Aquatic Life and Wildlife

DISSOLVED OXYGEN

CT-W1_001-SB

LIS WB Inner - Bridgeport Harbor, Bridgeport

Habitat for Marine Fish, Other Aquatic Life and Wildlife

NUTRIENTS

CT-W1_001-SB

LIS WB Inner - Bridgeport Harbor, Bridgeport

Habitat for Marine Fish, Other Aquatic Life and Wildlife

POLYCHLORINATED BIPHENYLS (PCBS)

CT-W1_001-SB

LIS WB Inner - Bridgeport Harbor, Bridgeport

Habitat for Marine Fish, Other Aquatic Life and Wildlife

POLYCYCLIC AROMATIC HYDROCARBONS (PAHS) (AQUATIC ECOSYSTEMS)

CT-W1_002-SB

LIS WB Inner - Black Rock Harbor, Bridgeport

Habitat for Marine Fish, Other Aquatic Life and Wildlife

DISSOLVED OXYGEN

CT-W1_002-SB

LIS WB Inner - Black Rock Harbor, Bridgeport

Habitat for Marine Fish, Other Aquatic Life and Wildlife

ESTUARINE BIOASSESSMENTS

2020 IWQR Appendix B-1 List of Impaired Waters for Connecticut (EPA Category 5)

52

Waterbody Segment ID

Waterbody Name Impaired Designated Use Cause

CT-W1_002-SB

LIS WB Inner - Black Rock Harbor, Bridgeport

Habitat for Marine Fish, Other Aquatic Life and Wildlife

NUTRIENTS

CT-W1_002-SB

LIS WB Inner - Black Rock Harbor, Bridgeport

Habitat for Marine Fish, Other Aquatic Life and Wildlife

OIL AND GREASE

CT-W1_002-SB

LIS WB Inner - Black Rock Harbor, Bridgeport

Habitat for Marine Fish, Other Aquatic Life and Wildlife

POLYCHLORINATED BIPHENYLS (PCBS)

CT-W1_002-SB

LIS WB Inner - Black Rock Harbor, Bridgeport

Habitat for Marine Fish, Other Aquatic Life and Wildlife

POLYCYCLIC AROMATIC HYDROCARBONS (PAHS) (AQUATIC ECOSYSTEMS)

CT-W1_003-SB

LIS WB Inner - Ash Creek, Fairfield Commercial Shellfish Harvesting Where Authorized

FECAL COLIFORM

CT-W1_003-SB

LIS WB Inner - Ash Creek, Fairfield Habitat for Marine Fish, Other Aquatic Life and Wildlife

GOLD

CT-W1_003-SB

LIS WB Inner - Ash Creek, Fairfield Habitat for Marine Fish, Other Aquatic Life and Wildlife

SILVER

CT-W1_003-SB

LIS WB Inner - Ash Creek, Fairfield Recreation ENTEROCOCCUS

CT-W1_004

LIS WB Inner - Pine Creek, Fairfield Shellfish Harvesting for Direct Consumption Where Authorized

FECAL COLIFORM

2020 IWQR Appendix B-1 List of Impaired Waters for Connecticut (EPA Category 5)

53

Waterbody Segment ID

Waterbody Name Impaired Designated Use Cause

CT-W1_006

LIS WB Inner - Mill River, Fairfield Shellfish Harvesting for Direct Consumption Where Authorized

FECAL COLIFORM

CT-W1_007

LIS WB Inner - Sasco Brook, Westport

Shellfish Harvesting for Direct Consumption Where Authorized

FECAL COLIFORM

CT-W1_007

LIS WB Inner - Sasco Brook, Westport Recreation

ENTEROCOCCUS

CT-W1_009

LIS WB Inner - Grays Creek, Westport

Shellfish Harvesting for Direct Consumption Where Authorized

FECAL COLIFORM

CT-W1_011

LIS WB Inner - Saugatuck River, Westport Recreation

ENTEROCOCCUS

CT-W1_012-SB

LIS WB Inner - Norwalk Harbor, Norwalk

Habitat for Marine Fish, Other Aquatic Life and Wildlife

DISSOLVED OXYGEN

CT-W1_012-SB

LIS WB Inner - Norwalk Harbor, Norwalk

Habitat for Marine Fish, Other Aquatic Life and Wildlife

LEAD

CT-W1_012-SB

LIS WB Inner - Norwalk Harbor, Norwalk

Habitat for Marine Fish, Other Aquatic Life and Wildlife

MERCURY

CT-W1_012-SB

LIS WB Inner - Norwalk Harbor, Norwalk

Habitat for Marine Fish, Other Aquatic Life and Wildlife

NITROGEN, TOTAL

CT-W1_012-SB

LIS WB Inner - Norwalk Harbor, Norwalk

Habitat for Marine Fish, Other Aquatic Life and Wildlife

NUTRIENTS

2020 IWQR Appendix B-1 List of Impaired Waters for Connecticut (EPA Category 5)

54

Waterbody Segment ID

Waterbody Name Impaired Designated Use Cause

CT-W1_012-SB

LIS WB Inner - Norwalk Harbor, Norwalk

Recreation ENTEROCOCCUS

CT-W1_013-SB

LIS WB Inner - Norwalk Hrbr (MarvinBeach), Norwalk

Habitat for Marine Fish, Other Aquatic Life and Wildlife

DISSOLVED OXYGEN

CT-W1_013-SB

LIS WB Inner - Norwalk Hrbr (MarvinBeach), Norwalk

Habitat for Marine Fish, Other Aquatic Life and Wildlife

NITROGEN, TOTAL

CT-W1_013-SB

LIS WB Inner - Norwalk Hrbr (MarvinBeach), Norwalk

Habitat for Marine Fish, Other Aquatic Life and Wildlife

NUTRIENTS

CT-W1_016-SB

LIS WB Inner - Holly Pond, Stamford Commercial Shellfish Harvesting Where Authorized

FECAL COLIFORM

CT-W1_018-SB

LIS WB Inner - Stamford Harbor (Inner), Stamford

Habitat for Marine Fish, Other Aquatic Life and Wildlife

DISSOLVED OXYGEN

CT-W1_018-SB

LIS WB Inner - Stamford Harbor (Inner), Stamford

Habitat for Marine Fish, Other Aquatic Life and Wildlife

NUTRIENTS

CT-W1_020

LIS WB Inner - Indian Harbor (upper), Greenwich

Habitat for Marine Fish, Other Aquatic Life and Wildlife

DISSOLVED OXYGEN

CT-W1_020

LIS WB Inner - Indian Harbor (upper), Greenwich

Habitat for Marine Fish, Other Aquatic Life and Wildlife

NUTRIENTS

2020 IWQR Appendix B-1 List of Impaired Waters for Connecticut (EPA Category 5)

55

Waterbody Segment ID

Waterbody Name Impaired Designated Use Cause

CT-W1_021-SB

LIS WB Inner - Greenwich Harbor, Greenwich

Habitat for Marine Fish, Other Aquatic Life and Wildlife

DISSOLVED OXYGEN

CT-W1_021-SB

LIS WB Inner - Greenwich Harbor, Greenwich

Habitat for Marine Fish, Other Aquatic Life and Wildlife

NUTRIENTS

CT-W2_001

LIS WB Shore - Lordship, Stratford Shellfish Harvesting for Direct Consumption Where Authorized

FECAL COLIFORM

CT-W2_002

LIS WB Shore - Long Beach, Stratford

Shellfish Harvesting for Direct Consumption Where Authorized

FECAL COLIFORM

CT-W2_003

LIS WB Shore - Seaside Park Beach, Bridgeport

Shellfish Harvesting for Direct Consumption Where Authorized

FECAL COLIFORM

CT-W2_005

LIS WB Shore - Pine Creek Point, Fairfield

Shellfish Harvesting for Direct Consumption Where Authorized

FECAL COLIFORM

CT-W2_012

LIS WB Shore - Outer Norwalk Harbor(East), Norwalk

Habitat for Marine Fish, Other Aquatic Life and Wildlife

DISSOLVED OXYGEN

CT-W2_012

LIS WB Shore - Outer Norwalk Harbor(East), Norwalk

Habitat for Marine Fish, Other Aquatic Life and Wildlife

NITROGEN, TOTAL

CT-W2_012

LIS WB Shore - Outer Norwalk Harbor(East), Norwalk

Habitat for Marine Fish, Other Aquatic Life and Wildlife

NUTRIENTS

2020 IWQR Appendix B-1 List of Impaired Waters for Connecticut (EPA Category 5)

56

Waterbody Segment ID

Waterbody Name Impaired Designated Use Cause

CT-W2_013

LIS WB Shore - Outer Norwalk Harbor(West), Norwalk

Habitat for Marine Fish, Other Aquatic Life and Wildlife

DISSOLVED OXYGEN

CT-W2_013

LIS WB Shore - Outer Norwalk Harbor(West), Norwalk

Habitat for Marine Fish, Other Aquatic Life and Wildlife

NITROGEN, TOTAL

CT-W2_013

LIS WB Shore - Outer Norwalk Harbor(West), Norwalk

Habitat for Marine Fish, Other Aquatic Life and Wildlife

NUTRIENTS

CT-W2_023

LIS WB Shore - Smith Cove, Indian Hrbr, Greenwich

Habitat for Marine Fish, Other Aquatic Life and Wildlife

DISSOLVED OXYGEN

CT-W2_023

LIS WB Shore - Smith Cove, Indian Hrbr, Greenwich

Habitat for Marine Fish, Other Aquatic Life and Wildlife

NUTRIENTS

CT-W2_023

LIS WB Shore - Smith Cove, Indian Hrbr, Greenwich

Shellfish Harvesting for Direct Consumption Where Authorized

FECAL COLIFORM

CT-W3_014

LIS WB Midshore - Outer Captain Harbor, Greenwich

Habitat for Marine Fish, Other Aquatic Life and Wildlife

DISSOLVED OXYGEN

CT-W3_014

LIS WB Midshore - Outer Captain Harbor, Greenwich

Habitat for Marine Fish, Other Aquatic Life and Wildlife

NITROGEN, TOTAL

CT-W3_014

LIS WB Midshore - Outer Captain Harbor, Greenwich

Habitat for Marine Fish, Other Aquatic Life and Wildlife

ORGANIC ENRICHMENT (SEWAGE) BIOLOGICAL INDICATORS